Consolidated Statements of Stockholders' Equity and Comprehensive Income (USD $) In Thousands, unless otherwise specified	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income	Retained Earnings	Noncontrolling Interest
Balances at Dec. 31, 2011	$ 1,082,444	$ 442	$ 995,147	$ 9,448	$ 77,407	$ 0
Balances (in shares) at Dec. 31, 2011		442,389
Increase (Decrease) in Stockholders' Equity
Net income (loss)	30,445				30,445
Other Comprehensive Income (Loss)	(3,036)			(3,036)
Noncontrolling interest	0
Share-based compensation expense	71,974		71,974
Equity related restructuring charges	413		413
Tax benefit on share-based compensation expense	(1,738)		(1,738)
Exercise of stock options (in shares)	0	1,239
Exercise of stock options	4,580	2	4,578
Issuance of common stock under employee stock purchase plan (in shares)		1,770
Issuance of common stock under employee stock purchase plan	10,957	2	10,955
Vested restricted stock units (in shares)		7,975
Vested restricted stock units	8	8
Shares withheld for employee taxes related to vested restricted stock units (in shares)		(2,100)
Shares withheld for employee taxes related to vested restricted stock units	(19,830)	(2)	(19,828)
Repurchase of common stock (in shares)	(22,700)	(22,680)
Repurchase of common stock	(179,579)	(23)	(179,556)
Balances at Dec. 31, 2012	996,638	429	881,945	6,412	107,852	0
Balances (in shares) at Dec. 31, 2012		428,593
Increase (Decrease) in Stockholders' Equity
Net income (loss)	(22,055)				(22,055)
Other Comprehensive Income (Loss)	6,385			6,385
Noncontrolling interest	0
Share-based compensation expense	42,454		42,454
Equity related restructuring charges	566		566
Tax benefit on share-based compensation expense	(913)		(913)
Exercise of stock options (in shares)	0	2,990
Exercise of stock options	12,343	3	12,340
Issuance of common stock under employee stock purchase plan (in shares)		1,920
Issuance of common stock under employee stock purchase plan	10,605	2	10,603
Vested restricted stock units (in shares)		7,335
Vested restricted stock units	0	7	(7)
Shares withheld for employee taxes related to vested restricted stock units (in shares)		(3,256)
Shares withheld for employee taxes related to vested restricted stock units	(20,315)	(4)	(20,311)
Repurchase of common stock (in shares)	(12,200)	(12,192)
Repurchase of common stock	(87,781)	(12)	(87,769)
Balances at Dec. 31, 2013	937,927	425	838,908	12,797	85,797	0
Balances (in shares) at Dec. 31, 2013		425,390
Increase (Decrease) in Stockholders' Equity
Net income (loss)	32,195				32,195
Other Comprehensive Income (Loss)	(20,979)			(20,979)
Noncontrolling interest	3,013					3,013
Share-based compensation expense	59,816		59,816
Exercise of stock options (in shares)	0	603
Exercise of stock options	2,362	0	2,362
Issuance of common stock under employee stock purchase plan (in shares)		1,695
Issuance of common stock under employee stock purchase plan	11,168	2	11,166
Vested restricted stock units (in shares)		7,972
Vested restricted stock units	8	8
Shares withheld for employee taxes related to vested restricted stock units (in shares)		(3,211)
Shares withheld for employee taxes related to vested restricted stock units	(25,128)	(3)	(25,125)
Repurchase of common stock (in shares)	(16,300)	(16,271)
Repurchase of common stock	(130,383)	(16)	(130,367)
Balances at Dec. 31, 2014	$ 869,999	$ 416	$ 756,760	$ (8,182)	$ 117,992	$ 3,013
Balances (in shares) at Dec. 31, 2014		416,178